. The adsorption of virions to host cells involves protein receptors on the host cell interacting with specific viral attachment proteins. Given the original titre of virus in this experiment was 3 X 105 pfu/ml and you used 0.2 ml to infect 1.8 ml the E. coli (2 X 108 cells/ml), what was the multiplicity of infection used in the adsorption part of the lab exercise? Show the calculation